/* 分类 */
.classificationBox{
    margin: 0;
    padding: 10px;
    /* border: 1px solid red; */
    overflow: auto;
}
.optionBox{    
    position: relative;
    width: 48%;
    float: left;
    margin: 1%;
    border-radius: 5px;
}
.optionBox img{
    width: 100%;
}
.optioncen{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    box-sizing: border-box;
    color: #ffffff;
}
.optionBox:nth-child(even) .optioncen{  
    padding-left: 15px;
    text-align: left;
} 
.optionBox:nth-of-type(odd) .optioncen{  
    padding-right: 15px;
    text-align: right;
}